Remote sensing for agricultural census and crop growth management
2007
Akiyama, T.(Gifu Univ. (Japan). River Basin Research Center)
Utilization of remote sensing technology is expanding in agriculture and environmental fields in accordance with the improvement of satellite sensors on board, hardware software development, and diffusion of GIS in recent years. 23 subjects (research themes) on agricultural census and crop growth management are included in Chapter 1 of Part 2 in the Handbook. In the first phases, basic researches like acquiring ground truth data and hyperspectral measurements of crops on ground and air-borne sensors are introduced. In the second phases, methodology development for supporting to arrange agricultural census by governments, autonomies, and agricultural, communities, are highlighted which include estimation of cultivation acreage, and cropping maps. In the final phases of Chapter 1, researchers reported on high quality low cost crop production applying satellite information on crop growth management. For instance, emphasis were given on technology to estimate protein content of rice grain before harvest for high nutrient quality, or determination of maturity of wheat grain for deciding harvest timing. It was also reported that in some root crops, chemical component such as starch value is detectable, or possible to give effective information for grassland renovation using satellite data. These technologies have been enrolled in a regional agricultural system, and committed for practical use in Hokkaido. In overseas, especially in monsoon Asia, satellite images are being used as useful source of information on paddy distribution, and regional cropping system.
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